JP4051174B2 - Engine control device having a starting system failure detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine control device including a start system failure detection device, and more particularly, to a start system failure detection device used for an engine of a type in which fuel such as gaseous fuel is charged from a small (simple) filling device to an engine. The present invention relates to an engine control device.
[0002]
[Prior art]
In recent years, environmental protection and economic demands surrounding automobiles have been steadily strengthened, and in particular, regulations for purifying exhaust gas containing components such as HC and CO discharged from the engine, and fuel consumption of the engine The demand for improved rates is high.
On the other hand, the fuel usually used in current engines is mainly liquid fuel such as gasoline and light oil. However, the liquid fuel has limited reserves, and in the future there will be a shortage of supply of the liquid fuel. Therefore, there is concern that the fuel price will rise. For this reason, development of vehicles using alternative energy has been rapidly carried out. Typical examples of vehicles using alternative energy include electric vehicles, hybrid vehicles of liquid fuel and electricity, alcohol and gas. Gas vehicles that use (natural gas, propane gas, hydrogen gas, etc.) as fuel are listed.
[0003]
Such alternative energy vehicles have many problems that need to be solved in terms of infrastructure such as fuel supply facilities and manufacturing costs. Currently, among the alternative energy vehicles, natural gas vehicles are one step ahead in the overall aspect including the infrastructure and manufacturing costs. Since methane gas is the main component, it is possible to reduce the amount of exhaust gas emissions compared to conventional liquid fuel vehicles.
[0004]
The maintenance of infrastructure such as fuel supply facilities enables fuel filling not only by prescribed fuel filling stations but also by the spread of small filling devices (including household use), but a filling nozzle is connected to the fuel filling port of an automobile. If the engine is started and the vehicle is run in the as-is state, in the case of a small filling machine, dragging or breakage may occur, causing gas leakage from the filling device or gas leakage due to failure of the fuel filling port. May cause.
[0005]
In the prior art, a fuel filling port switch is connected in series to the power supply line of the starter for starting the engine, and during filling, the starter power supply line is shut off by the filling port switch, and the engine starting is prohibited. Prohibiting measures are provided to ensure safety. However, the start prohibiting means for prohibiting the engine start is usually configured as a system of a different system from the engine control device (control unit).
[0006]
[Problems to be solved by the invention]
By the way, the system having the start prohibiting means for prohibiting the conventional engine start is provided in the automobile so that the engine is started with the filling nozzle connected to the fuel filling port of the automobile. Therefore, the reliability of the engine when starting the engine is ensured by the system. In the system, various connection methods are devised in case of a system failure. However, in any connection method, the current system configuration is to use conductive wires (harness), switches, and relays as the main system configuration.
[0007]
In addition, since the system does not intervene a control device, when the system fails, it is not possible to determine whether the harness, switch, or relay that is a wiring component is faulty. If there is a failure, there is a concern that safety may be reduced. For example, in the case of a switch failure, the switch should actually be open (cut off) because it is filling, but for some reason it is shorted (short circuit) or the relay is stuck (conducted) in a short state, Will not work properly.
[0008]
In addition, the increase in filling work outside the filling station shows an increasing trend accompanying the aforementioned infrastructure development (more specifically, the spread of household filling equipment), but the increase in work mistakes is also expected to be the same. Ensuring safety in work needs to be performed more strictly than ever before.
The present invention has been made in view of the above-described problems, and its object is to provide a state in which a filling nozzle is connected to a fuel filling port of an automobile, that is, fuel to an engine fuel storage means. It is an object of the present invention to provide an engine control device including a start system failure detection device capable of accurately determining a failure of a start prohibiting means for prohibiting engine start and a control means at the time of failure.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an engine control device according to the present invention comprises: Start means for starting the engine, start state detection means for detecting a state in which the engine is started, a fuel injection device, fuel storage means, and a filling state for detecting the state of fuel filling in the fuel storage means An engine control device comprising: a detecting means; a start prohibiting means during fuel filling for prohibiting starting by the starting means when the fuel filling state is detected by the filling state detecting means; and a starting system failure detecting device. There, Start system failure detection device Is Failure judgment means Comprising The failure determination means is prohibited from starting by the start prohibiting means during fuel filling. When When the start state detecting means detects a start state, the start prohibiting means during fuel filling is judged as a failure.
[0010]
The engine control apparatus having the starting system failure detecting device of the present invention configured as described above is provided when the starting state detecting means detects the starting state when the starting is prohibited by the starting prohibiting means during fuel filling. Since the failure determination means determines that the start prohibiting means during fuel filling is a failure, it is possible to prevent unexpected engine start and vehicle movement in the fuel filling state, and an improvement in safety can be expected.
[0011]
Further, in a specific aspect of the engine control device provided with the starting system failure detecting device of the present invention, the starting state detecting means generates a determination signal corresponding to the start / stop of the starting means in conjunction with the starting means. A starting state is detected based on the output signal from the operating state detecting means, and an output signal from the operating state detecting means is an engine rotation parameter, a battery voltage parameter, an intake air parameter, or This is a vehicle speed parameter.
[0012]
As in the above configuration, it is possible to easily detect a failure in the engine start system from the engine start / stop information or the engine operating state.
Furthermore, in another specific aspect of the engine control apparatus including the starting system failure detection apparatus of the present invention, the fuel filling state is detected by the filling state detecting means separately from the fuel filling port of the vehicle and the vehicle. It is characterized in that it is carried out based on the connection state with the external filling device or based on the transition of the amount of fuel stored in the fuel storage means.
[0013]
Furthermore, another specific aspect of the engine control device provided with the starting system failure diagnosis device of the present invention is the above-described failure determination means. Said When it is determined that the start prohibiting means during fuel filling is faulty, the fuel supply stopping means stops the fuel supply to the engine, and the fuel supply stopping means Stop Implemented by operating Is Or the fuel storage cylinder and the fuel injection device When Implemented by operating the fuel supply shut-off device installed between Is It is characterized by that.
[0014]
With the above configuration, the engine operation can be stopped simultaneously with the failure of the start prohibiting means during fuel filling, so that inadvertent running of the vehicle is prevented, and dragging and breakage of the filling device is prevented in advance. No gas leakage or gas leakage due to a failure of the fuel filling port.
Furthermore, still another specific aspect of the engine control device provided with the starting system failure detection device of the present invention is that an alarm device is used when the failure determination unit determines that the start prohibition unit during fuel filling is failed. It is characterized by alarming and storing the failure information in the memory and outputting the failure information in the memory when there is a request for outputting the failure information from an external diagnostic apparatus connected from the outside.
[0015]
With the above configuration, it is possible to notify the driver and the like, and the determination parameters when the failure state is determined are also stored in the RAM at the same time, and transferred as failure information together with flag information when an output is requested from the external diagnostic device. Thus, the serviceability is further improved, and the repair of the faulty part can be promoted.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on the drawings, an engine control device including a starting system failure detection device according to an embodiment of the present invention will be described in detail.
FIG. 1 is an overall configuration diagram of an engine system of an engine control device provided with a starting system failure detection device of the present embodiment.
[0017]
In the engine 1, an intake pipe 4 and an exhaust pipe 5 are connected to each cylinder 2. A spark plug 7 is attached to the cylinder 2, and an injector 18 is attached to the intake pipe 4. It is attached. An air cleaner 3 and a throttle valve 23 are disposed upstream of the intake pipe 4, and an air flow sensor 6 and a throttle sensor 21 are attached. An oxygen sensor 20 is attached to the exhaust pipe 5, and a water temperature sensor 8 is attached to the cylinder 2.
[0018]
The state information of the engine 1 includes an intake air amount detection sensor 6 that measures the mass flow rate of intake air that passes through the air cleaner 3 and passes through the intake pipe 4 and is sucked into the engine 1, a water temperature sensor 8 that measures the cooling water temperature of the engine, An intake air temperature sensor 9 for measuring temperature, a crank angle sensor for detecting a crank angle (not shown), a throttle sensor 21 for detecting a throttle valve angle, and a vehicle speed sensor for detecting the rotational speed of a drive shaft for driving a wheel (not shown) Is input to the control unit 24, and the control unit 24 determines the engine speed from the crank angle sensor signal and the engine load from the throttle opening, the intake air amount, and the engine speed. Is calculated.
[0019]
The control unit (control device) 24 calculates the optimum fuel injection pulse width, fuel injection timing, ignition timing, and the like supplied to the engine 1 based on various information, and injects fuel from the injector 18 that is a fuel injection valve. Control as much as you can. Further, in the ignition system, based on various information from the various sensors, the ignition timing suitable for the operating condition is calculated, and the ignition gas is supplied to or interrupted from an ignition coil (not shown), and the mixture in the combustion chamber is detected by the spark plug 7. Ignite.
Further, the control unit 24 calculates a feedback correction value based on a signal from the exhaust sensor 20 that measures the oxygen concentration in the exhaust gas discharged through the exhaust pipe 5 so that the air-fuel mixture becomes the stoichiometric air-fuel ratio. Correct the injection pulse width.
[0020]
On the other hand, the gaseous fuel supply system includes a fuel cylinder 10 that stores gaseous fuel, a filling port 19 that fills the fuel cylinder 10 in a high-pressure state with gaseous fuel from a filling device, and a pressure regulator that regulates the fuel pressure of fuel injection. ) 16, an injector 18 for injecting fuel, a high pressure pipe 15 for connecting the cylinder 10 and the regulator 16, a low pressure pipe 17 for connecting the regulator 16 and the injector 18, a cylinder side of the high pressure pipe 15 and the regulator 16 side The shut-off valves 11 and 12 and the low-pressure pipe 17 are provided with a fuel temperature sensor 13 for detecting a fuel state (fuel temperature and fuel pressure) and a fuel pressure sensor 14. A fuel pressure sensor and a fuel temperature sensor (not shown) corresponding to a high pressure for detecting abnormal fuel pressure and fuel temperature are arranged and configured.
[0021]
In addition, a starter signal from the starter 22 is input to the control unit 24 in order to determine whether the engine 1 is started or not.
FIG. 2 shows an example of an engine start system (actually, the connection is more complicated than shown, and there are other system connection methods, but this time for simplicity of explanation) The system connection as shown in FIG. 2 will be described, and the description regarding other connections will be omitted).
[0022]
A main switch 34 (commonly called an ignition switch) that is manually operated is first installed downstream of the positive electrode of the battery 33, and the power supply to the vehicle and the engine 1 is turned on / off by the main switch 34 being intermittent. On the downstream side, a starter switch 35 and a filling switch 36 are installed in parallel. Usually, the main switch 34 and the starter switch 35 are integrated by a driver's seat key cylinder. The filling switch 36 is integral with the filling port 19 and is intermittently connected by inserting and removing the filling nozzle during filling.
[0023]
Downstream of both switches 35 and 36, There are a sub-relay 37 and a starter relay 38 as start prohibiting means during fuel filling, Sub relay 37 Is When the filling nozzle is not inserted into the filling port 19, the filling switch is turned on (conducting state) and the starter switch 35 is turned on (conducting state), thereby driving the downstream starter relay 38 and supplying a large current to the starter. The engine 1 is started (cranked) by the rotation of the starter 22.
[0024]
In addition, when a filling nozzle is inserted in the filling port 19, the filling switch 36 is OFF (blocking state), and even if the starter switch 35 is turned ON (conducting state), no power is supplied to the starter 22 and filling is performed. The engine start inside can be prohibited and safety can be ensured.
The above is the outline of the system configuration that is the premise of the present embodiment. Next, the outline of the present embodiment will be described with reference to the control flowchart of FIG. 3 (this flowchart is routinely processed at regular time intervals). .
[0025]
The present embodiment focuses on monitoring the start prohibition system during filling, and in step 25, the filling state of gaseous fuel is detected. As shown in FIG. 4 and FIG. 5, there are two types of detection methods for the filling state. One is a method for electrically detecting the connection state of the filling port in FIG. One is a detection method based on the state of the filled gaseous fuel in FIG.
[0026]
One detection method of FIG. 4 is a method of taking the potential state on the upstream side of the filling switch 36 described in FIG. Since the filling switch 36 is turned on except during filling, the loading state (LidSW) b of the control unit 24 becomes Low level when the main switch 34 is turned on, and the loading state ( LidSW) b goes to a high level. At this input level, it can be determined whether or not the gaseous fuel is being filled.
[0027]
Another method of FIG. 5 is a system that does not include the detection of the state of the filling switch 36 (cost reduction), or a case where there is a filling switch 36 but the filling switch 36 fails for some reason. This is a method for ensuring safety. The fuel pressure in the fuel cylinder 10 is measured at regular time intervals. If the fuel pressure is being filled, the fuel pressure in the fuel storage cylinder increases as shown in FIG. Eventually, the maximum fuel pressure (about 200 atmospheres in Japan) is reached.
[0028]
In this embodiment, in order to clarify the filling state, as shown in FIG. 5B, the cylinder internal pressure is obtained as the amount of change (change rate), and if the amount of change is equal to or greater than the threshold value PT. Determine that filling is in progress. Incidentally, the threshold value PT is set between the increase in fuel pressure due to the outside air temperature generated in the natural standing state and the increase in fuel pressure pressurized by the filling machine. However, this is impossible to measure unless the main switch 34 is in an ON state. In this embodiment, a small-sized filling machine for home use is assumed. As a result, the filling speed is extremely slow (an image where filling is completed overnight), and this is effective in preventing the driver from forgetting to remove the filling port 19 caused by the long filling time.
[0029]
Returning to FIG. 3 again, it is determined whether or not the fuel is being filled by the above-described method. If not, the routine is terminated as it is, but if it is determined that the fuel is being filled, the routine proceeds to step 27. In step 27, the operating state of the engine 1 and the vehicle (for example, engine speed and vehicle speed information input by the control unit 24) is detected. By the start state detection means A starting state is detected (the starting state detecting method will be described later).
[0030]
If it is determined in step 29 that the engine is not in the starting state, the present routine is terminated. If the engine is determined to be in the starting state, the process proceeds to step 30. In the failure determination means of the starting system failure detection means, Start-up safety system during filling and starting (Start prohibition means during fuel filling) Is not running ( Filling fuel The flowchart is terminated. The technical matters of step 29 and step 30 are the features of this embodiment. Next, the starting state detecting means of this embodiment will be described.
[0031]
FIG. 6 describes the level of the signal (STSW) a that is taken into the control unit 24 upstream of the starter switch 35 due to the intermittent state of the filling switch 36 and the start switch 35 (starter switch).
When the starter switch 35 is on and the filling switch is on, the level is low, and when the starter switch 35 is on and the filling switch is off, the level is high and taken into the control unit 24. That is, the Low state means that the engine is starting, and the High state means that the engine is stopped. The starting state can be determined by the signal (STSW) a.
[0032]
Here, securing of the reliability of the sub-relay 37 will be described a little. When the sub-relay 37 is out of order, particularly when the sub-relay 37 is stuck (always ON regardless of whether the filling switch 36 is ON or OFF), the start prohibition due to the state of the filling switch 36 is not permitted. It goes without saying that it is possible. Generally, it is a rare frequency that a relay arcs by repeating ON / OFF and is fixed by the arc discharge or the like. In particular, recently, since the low cost orientation is strong and there is a concern that the reliability of the relay may be lowered, a system configuration that also assumes relay fixation is required (FIG. 8 shows a state in which the sub-relay 37 is fixed). )
[0033]
In the present embodiment, the failure state of the sub-relay can be detected by monitoring the STSW level a. That is, as shown in FIG. 7, when the start switch 35 is in the ON state, the STSW level a is always set to the Low level regardless of the ON / OFF state of the filling switch 36. Accordingly, by monitoring the STSW level for each state of the filling switch 36 and the start switch 35, it is possible to determine the start state and the system failure (relay failure).
[0034]
Next, the starting state detecting means of the present embodiment will be described based on FIGS.
FIG. 9 shows the states of the start switch 35 and the filling switch 36 with respect to changes in the engine speed, which is one of the operation state detection signals. (A) shows the state of the filling switch, (b) shows the state of the start switch (starter switch), and (c) shows the engine speed. In a normal state, if the charging switch 36 is in the cut-off state and the starter switch 35 is in the conductive state, the engine is in a start-inhibited state, and therefore it is impossible to generate (increase) the engine speed due to cranking ((c ) The engine speed is in a dotted line state). However, in the above state, when the engine speed has increased (the engine speed in FIG. 9 is in a solid line state and exceeds the threshold value N), the engine is in a start state in which start is permitted for some reason. Can be determined. Furthermore, it is also possible to distinguish from pushing (downhill) by combining with the state of the vehicle speed signal.
[0035]
FIG. 10 shows a state in which the voltage of the battery 33 is taken into the control unit 24 and the start is determined based on the change in the voltage, as in FIG. When the engine 1 is started by the starter 22, a large current is required. When cranking is started for some reason, the battery voltage greatly drops from about 12V when the engine is stopped (in FIG. 10). , Below threshold V1). Furthermore, after that, when the engine rotation continues, the voltage rises to about 14.4 V due to the power generation of the alternator (exceeds V2 in FIG. 10). Thus, it is possible to determine the start by detecting the battery state.
[0036]
FIG. 11 is a method for determining start by the signal of the intake air amount detection sensor 6 in the same manner. When the engine is stopped, air is not sucked into the engine 1, but when it is started for some reason. As shown in FIG. 11, when the intake air amount is detected and the intake air amount exceeds the threshold value Q, the start can be determined by detecting the intake air amount.
[0037]
FIG. 12 is an auxiliary embodiment rather than a method of directly determining engine start, but detects movement of the vehicle based on the vehicle speed. In other words, if the vehicle travels in the filling state, it will cause dragging of the filling machine (occurrence of gas leakage due to damage to the filling machine), and this state must never occur. Therefore, as shown in FIG. 12, the vehicle speed is monitored, and when it exceeds the threshold value SP, it is determined that the vehicle is started (self-running).
[0038]
The various start determination methods described above may be used alone or in combination.
The various methods for detecting the failure of the start prohibiting means by detecting the filling state and the start state of the present embodiment have been described above. Next, processing after the failure determination of the start prohibiting means will be described.
[0039]
FIG. 13 is a control flowchart substantially equivalent to that of FIG. 3 showing the failure determination of the start prohibiting means and the subsequent control processing. In step 26, it is determined whether or not fuel is being charged. In step 29, it is determined whether or not the engine is in a starting state. From the result, in step 30, a failure determination of the starting prohibiting means is performed. If it is determined that there is a failure, the fuel supply to the engine 1 is stopped (shut off) in step 39, and the engine 1 is stopped by this stop (the vehicle is not allowed to travel) to prevent damage to the filling equipment. To ensure safety.
[0040]
In other words, in a situation where the engine is being charged and it is desired to prohibit the start of the engine, the engine 1 shuts off the fuel in order not to start it. There are two methods for shutting off the fuel supply as described below.
One method is a method of stopping fuel injection from the fuel injection device (injector 18) of the engine 1 shown in FIG. 1, and the other method is the fuel cutoff valve 11 installed in the high-pressure pipe 15 shown in FIG. In this method, the fuel path is shut off by the fuel cutoff valve 12. According to the two methods, when the start prohibiting means breaks down, the fuel passage in the fuel pipe is shifted to the shut-off state, and the fuel supply can be stopped. In the above method, since the method of shutting off the fuel supply by the injector 18 is more effective, when it is determined that the start prohibiting means has failed, the fuel supply by the injector 18 is first shut off, and then the source of the supply The fuel is preferably shut off by the fuel shut-off valves 11 and 12 which are valves.
[0041]
The fuel cutoff method at the time of determining the failure of the start prohibiting means has been described above. Next, an embodiment for improving serviceability such as notifying the driver, dealer mechanics, etc. of the failure state will be described.
14 is a diagram showing a state in which an external alarm device 51 and an external diagnostic device 52 are connected to the control unit 24 with respect to the configuration diagram of FIG. For example, the external alarm device 51 is a lamp or a buzzer installed in a meter panel, and the external diagnostic device 52 is a failure diagnosis tester used in vehicle inspections, periodic inspections, etc. by dealer mechanics. Connection to the external diagnostic device 52 is established by connecting with a dedicated connector when necessary, and examples of the communication method include serial communication using a plurality of lines, single line, and multiple communication using an optical cable.
[0042]
FIG. 15 is a control flowchart showing alarm means for the external alarm device 51. FIG. 15 differs from FIG. 13 only in step 39 and step 53. FIG.
If it is determined in steps 26, 29, and 30 that the start prohibiting means has failed, output to the external alarm device 51 is performed in step 53. Specifically, if the external alarm device 51 is a lamp, the power supply to the lamp is controlled in step 53 to light the lamp.
[0043]
16 and 17 are control flowcharts showing an outline of an information transfer method with the external diagnostic device 52.
FIG. 16 shows a method of storing the failure determination information of the start prohibiting means in the memory in the control unit 24. Steps 26, 29 and 30 are the same as those in FIG. In step 54, an area (for example, flag information) corresponding to the failure of the start prohibiting means is set in the storage RAM for storing various fault histories, and when it is determined that the start prohibiting means is faulty. , Store information in this area. For example, when normal, the flag is 0 (clear), and when abnormal, the flag is 1 (set).
[0044]
FIG. 17 is a control flowchart relating to the exchange of information with the external diagnostic device 52. In step 55, it is determined whether or not there is a request for outputting failure information from the external diagnostic device 52. In the external diagnostic device 52, the service mechanic sets a failure information output request in the external diagnostic device 52, or sets a preset automatic diagnostic process in the external diagnostic device 52 to the control unit 24. A failure information output request signal is output via the communication line. If it is determined in step 55 that there is no request, the routine is terminated. If it is determined that there is a request, the process proceeds to step 56, and the failure information (for example, flag information) stored in FIG. 16 is called. In step 57, the failure information is output to the external diagnostic device 52 via the communication line, and the external diagnostic device 52 displays the failure code or the failure part based on this on the screen (display) of the external diagnostic device 52. To do.
[0045]
With the above control means, failure information can be transferred to the external diagnostic device 52, and serviceability can be improved. Further, the determination parameters when the failure state is determined (for example, the engine speed and the battery voltage described above in the start state determination) are also stored in the RAM at the same time, and flag information is output when an output is requested from the external diagnostic device 52. At the same time, by transferring the information as failure information, the serviceability is further improved and the repair of the failure part can be promoted.
[0046]
As described above, the engine start system failure detection device according to the present embodiment can prevent unexpected engine start and vehicle movement based on the failure of the start prohibiting means in the filling state, and can improve safety. .
Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various designs can be used without departing from the spirit of the invention described in the claims. It can be changed.
[0047]
For example, in the above embodiment, the gaseous fuel is described as natural gas. However, the gaseous fuel is not limited to natural gas, and other gaseous fuels can be applied to the present invention. When a small household charger such as an electric vehicle or a hybrid vehicle is used, the present invention can also be applied to a leakage prevention function based on dragging of the small charger.
[0048]
【The invention's effect】
As can be understood from the above description, an engine control device provided with a starting system failure detection device of the present invention includes a start-in-fuel-inhibiting means for prohibiting starting by the engine starting means, and a failure determination means, When starting is prohibited by the starting prohibiting means during filling, when the starting state detecting means detects the starting state, the failure determining means determines that the starting prohibiting means during fuel filling is faulty. It is possible to prevent unexpected engine start and vehicle movement in the state, and it can be expected to improve safety.
[0049]
Also, by providing an external alarm device, it is possible to notify the driver and the like, and the failure determination information of the start prohibiting means is stored in the memory in the control device, so an output request from the external diagnostic device Occasionally, transfer as failure information together with flag information further improves serviceability and facilitates repair of failure sites.
[Brief description of the drawings]
FIG. 1 is an overall system configuration diagram showing an embodiment of an engine control device provided with a starting system failure detection device according to the present invention.
2 is a diagram showing an example of an engine start system of the start system failure detection device of FIG. 1;
FIG. 3 is a control flowchart of the starting system failure detection device of FIG. 1;
4 is a table showing a signal state of a filling switch of means for electrically detecting a connection state of a filling port of the starting system failure detection device of FIG.
FIG. 5 is a view showing a pressure state in a gas fuel cylinder filled in the starting system failure detection device of FIG. 1;
6 is a diagram illustrating a signal state of a start switch when the starter system failure detection device of FIG. 1 is normal. FIG.
7 is a diagram showing a signal state of a start switch when the start-up system failure detection device of FIG. 1 is abnormal.
FIG. 8 is a diagram showing a state at the time of failure of the engine start system of FIG. 2;
FIG. 9 is a timing chart for starting state determination showing the states of the start switch and the charging switch with respect to changes in the engine speed of the engine start system of FIG. 2;
10 is a timing chart for starting state determination showing states of a start switch and a charging switch with respect to a change in battery voltage in the engine start system of FIG. 2;
11 is a timing chart of start state determination showing the state of the start switch and the charging switch with respect to a change in the intake air amount of the engine start system of FIG. 2;
12 is a timing chart for starting state determination showing the states of a start switch and a filling switch with respect to a change in the vehicle speed of the vehicle in the engine start system of FIG. 2;
FIG. 13 is a control flow chart showing a failure determination of the start prohibiting means of the engine start system failure detecting device of FIG. 1 and a subsequent control process;
14 is a system configuration diagram in which an external diagnosis device is added to the starting system failure detection device of FIG. 1;
15 is a control flowchart of the starting system failure detection device of FIG. 14;
16 is a control flowchart for storing failure determination information of the start prohibiting means of the starting system failure detection device of FIG. 1 in a memory in the control unit.
FIG. 17 is a control flowchart relating to the exchange of information with the external diagnosis device of the starting system failure detection device of FIG. 14;
[Explanation of symbols]
1. engine
2. Engine cylinder
8). Water temperature sensor
9. Intake air temperature sensor
10. Cylinder
11. Fuel shut-off valve
12 Fuel shut-off valve
13. Fuel temperature sensor
14 Fuel pressure sensor
16. Regulator
18. Injector
20. Exhaust sensor
22. Starter
24. control unit
33. Battery
35. Starter switch
36. Filling switch
51. External alarm device
52. External diagnostic device

Claims (14)

Start means for starting the engine, start state detection means for detecting a state in which the engine is started, a fuel injection device, fuel storage means, and a filling state for detecting the state of fuel filling in the fuel storage means An engine control device comprising: a detecting means; a start prohibiting means during fuel filling for prohibiting starting by the starting means when the fuel filling state is detected by the filling state detecting means; and a starting system failure detecting device. There,
The start-up system failure detection device includes a failure determination unit, and the failure determination unit detects a start state when the start state detection unit detects a start state when the start should be prohibited by the start prohibition unit during fuel filling. An engine control device characterized in that the start prohibiting means during fuel filling is judged as a failure . 2. The engine control apparatus according to claim 1, wherein the starting state detecting unit detects a starting state based on a determination signal corresponding to activation / stop of the starting unit in conjunction with the starting unit. The starting state detecting means, engine control apparatus according to claim 1, characterized in that to detect the start state based on the output signal from the operating condition detecting means. The output signal from the operating condition detecting means, engine control apparatus according to claim 3, characterized in that the engine rotation parameter. The output signal from the operating condition detecting means, engine control apparatus according to claim 3, characterized in that the battery voltage parameter. The output signal from the operating condition detecting means, engine control apparatus according to claim 3, characterized in that the intake air parameter. The output signal from the operating condition detecting means, engine control apparatus according to claim 3, characterized in that the vehicle speed parameter. The detection of fuel filling state in the filling state detecting means, e of claim 1, wherein the fuel filling port of the vehicle, that the vehicle is performed based on the connection state with another external filling device Engine control device. The detection of fuel filling state in the filling state detecting means, engine control apparatus according to claim 1, characterized in that it is carried out on the basis of the transition of the fuel storage amount in the fuel storage means. Said failure when it is determined that the failure of the fuel filling in start inhibition means by determining means engine control apparatus according to claim 1, characterized in that the supply of fuel to the engine by the fuel supply stop means. Said fuel supply stopping means, engine control apparatus according to claim 10, characterized in Rukoto be carried out by stopping operation of the fuel injector. Said fuel supply stopping means, engine control apparatus according to claim 10, characterized in Rukoto be carried out by actuating the installed fuel supply shut-off device between the fuel storage tanks and the fuel injection device . Wherein when it is determined that the failure of the fuel filling in start inhibition means by the failure determining means, engine control apparatus according to claim 1, characterized in that the warning by the warning device. Wherein when determining the fuel fill during start prohibiting means by the failure determining means malfunction may store failure information in memory, if there is an output request for the failure information from an external diagnostic device connected externally It is engine control apparatus according to claim 1, characterized in that for outputting failure information in said memory.

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